This is a reminder put out by IDOT as well as local municipalities to warn drivers in cars and trucks to be aware that warm weather brings out people on motorcycles. They are often hard to see so beware. A horrific accident in Wentzville this morning where two people riding motorcycles were killed when they crashed into a school bus.
The accident reconstruction work isn't complete as yet to understand how this happened, but it is a warning to the rest of us to be vigilant. Also, however, if you're riding a cycle of any kind you do have to realize you are smaller than the rest of the traffic and may not be easily seen so you too have to ride defensively.